<!DOCTYPE html>
<html lang="zh-CN">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>404 - 页面未找到</title>
    <style>
        /* --- CSS 样式 --- */
        body {
            margin: 0;
            padding: 0;
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";
            background-color: #f8f9fa;
            color: #343a40;
            display: flex;
            justify-content: center;
            align-items: center;
            height: 100vh;
            text-align: center;
        }

        .container {
            max-width: 600px;
            padding: 20px;
        }

        h1 {
            font-size: 10rem;
            margin: 0;
            font-weight: 700;
            color: #6c757d;
            text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.1);
        }

        p {
            font-size: 1.5rem;
            margin-top: 0;
            margin-bottom: 2rem;
        }

        .home-link {
            display: inline-block;
            padding: 12px 24px;
            font-size: 1rem;
            font-weight: 600;
            color: #fff;
            background-color: #007bff;
            border: none;
            border-radius: 5px;
            text-decoration: none;
            transition: background-color 0.3s ease;
        }

        .home-link:hover {
            background-color: #0056b3;
        }
    </style>
</head>
<body>
    <div class="container">
        <h1>404</h1>
        <p>抱歉，我们找不到您要访问的页面。</p>
        <a href="/" class="home-link">返回首页</a>
    </div>
</body>
</html>